Insulating telegraph



(N'oModeL) I D. BROOKS, Jr.

. INSULATING TELEGRAPH, TELEPHONE AND OT ER WIRES.

No. 244,791. Pa.tented July 26,1881.

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N. PETERS. Phnla-mvw n nqr. Waahiuglnn, 04 C.

V UNITED STATES PATENT OFFICE.

DAVID BROOKS, JR, OF PHILADELPHIA, PENNSYLVANIA.

INSULATING TELEGRAPH, TELEPHONE, AND OTHER WIRES.

SPECIFICATION forming part of Letters Patent No. 244,791, dated July 26, 1881. Application filed November 29, 1880. (No model.)

To all whom it may concern: I

Be it known that 1, DAVID BROOKS, Jr., a citizen of the United States, residing inthe city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvementin Insulating Telegraph,Telephone, and Other Wires, which improvement is fully set forth in the following specification and accompanying drawing, in which the figure is a side elevation andinterior view of apparatus embodying my invention.

My invention consists of apparatus, substantially as hereinafter set forth, whereby wires are insulated by forcing into the condnctor or pipe containing them the insulating material by pressure created by volatilizin g a portion of said material in anair-tight receiver or vessel with which the conductor communicates, as will be hereinafter stated.

Referring to the drawing, A represents an air-tight vessel for heating the insulating ma terial; and B represents a heatingchamber for receiving the conductor or pipe containing the wires to be insulated, the heating of the vessel and chamber being accomplished by a furnace or other suitable means, a. The conductor-pipe, coiled or wound on a reel, 1), is placed in the chamber B, and one end, a, passed through openings in the wall of said chamber and top of the vesselA, and reaches to near the bottom of the latter, so as to dip well into'the material. The other end of the pipe is passed out through a wall of the cham her and directed to a tank, tub, &c., for collecting material after it leaves the pipe.

The vessel A, made of strong material,has a cap, which is first opened to admit theinsulating material, and afterward securely closed,

so that the vessel is air-tight. The insulating material has applied to it a suitable quantity 40 of light oil, which may, however, be a component part of said material, the oil to be or being of such nature that it Volatilizes at from 230 to 250 heated the oil of the insulating material volatilizes and creates a pressure,which is exerted on the surface of the heated and fluid insulating material, the material being thus forced from the vessel into and through the'pipe, whose end projects into the vessel,as has been stated. When the insulation is effected the pipe is detached from the vessel A and removed from the chamber B, and both of its ends are duly capped o1 closed, the pipe with its insulated wire or cable then being in condition to be laid.

If desired, the pipe that projects into the vessel A may be a fixture thereof, in which case it is provided with couplings or other means of connection with the pipe placed in the heating-chamber.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The air-tight vessel A, heating apparatus a, pipe a, and chamber B, containing the conductor or pipe, combined and operating as described, whereby the pressure created within said vessel by the volatilization of a portion of the insulating-fluid forces the fluid material into the conductor in the chamber 13 and insulates the wires, as stated.

DAVID BROOKS, JR.

Witnesses:

JOHN A. Wrnnnnsnnm, A. 1?. GRANT.

When the "essel A is 

